<template>
    <div class="todo-footer">
        <label>
            <input type="checkbox" v-model="isCheckAll"/>
        </label>
        <span>
          <span>已完成{{count}}</span> / 全部{{todos.length}}
        </span>
        <button class="btn btn-danger" @click="clearCompltedData">清除已完成任务</button>
    </div>
</template>

<script lang="ts" setup name="Footer">
import {type Todo} from "@/Types/Todo";
import {computed, ref} from "vue";

let props = defineProps({
    todos: {
        type: Array as () => Todo[],
        required: true
    },
    isAllChecked: {
        type: Function,
        required: true
    },
    clearCompltedData: {
        type: Function,
        required: true
    }
})

// 已完成
const count = computed(()=> {
    return props.todos?.reduce((pre,todo,index)=> {
        console.log(pre)
        console.log(todo)
        console.log(index)
        return pre + (todo.isCompleted? 1: 0)
    },0);
})
// 全选，全不选
const isCheckAll = computed({
    get() {
        return count.value > 0 && count.value === props.todos?.length
    },
    set(val) {
        props.isAllChecked(val)
    }
})
</script>

<style scoped>
/*footer*/
.todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
}

.todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
}

.todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
}

.todo-footer button {
    float: right;
    margin-top: 5px;
}
</style>
